Sulfur color and process of making same.



inn SAMUEL GHAPIN, or NE YORK, n. Y;

SULFUR COLOR AND PROCESS OF MAKING SAME.

Specification'of Letters Patent- ,1,

Patented Jan, 12, woe.

Application filed February 7, 1907.. Serial No; 35%,2OE5.

and State of New York, havemade a new and useful Improvement'm SulfurColors and Process of Making the Same, of which the following is aspecification.

I have found that by heating a mixture of Copper sulfate, sulfur, sodiumsultid, one of various members of the chemical group denominatedfcarbohydrates, and'one of various members of the chemical groupdenominated aromatic chemicals, I have obtained new coloring mattersjThese coloring matters are of remarkableconcentration and are superiorintone and fastnesses to coloring mattersnnade of the above mentionedsubstances, but without the use of copper sulfate. I

Example: 32 grams of X11 5 Gone. and 32 grams of water (or, in place ofboth, (it grams ofat ,S' crystals), are melted to solution. 39 grams ofsulfur'areadded. and this mass boiled to dissolve so much of the sulfuras will readily dissolve tiierein. l harefound-that the best results areob 'tained by employing sulfur in excess of the amount that will readilydissolve in the sulfid solution. 15 grams of solid metaphenylene diamin(or the equivalent of the same in factory Weak solution) are then addedthen 9 gramsof dry, starch, and then .3 grams ofcopper sulfate crystals(blue, stone) dissoli'ed in 10 cubic ccnti meters of Water, are added.The mass i:

heated to dryness; Then the temperature is raised to 14:0" C. andmaintained at that point for one hour: it is then raised to between 300and'350 C. and maintained at that point for about half an hour, 'oruntil the full tinctorial strength of the product isdeyelopedj Theresulting dyestutl dissolves readily in cold Water, cold causticalkaline or-caustic carbonate solutions to a bright 'I ich reddishbrownsolution, and dyes unmbrdanted cotton in an alkaline salt bath-reddishcutch lorown shades l of superior fastness.

A similar product can be obtained by per sulfate'sulfur, sodium su'llid.and an aromatic chemical. substantially a starch,

using, in place of nieta-phenylene'diamin,

' either meta-di-nitrobenzene or meta-intram- ]in. if suflicient sodiumsulfid headoled to re ducethese substances to meta-phenylene diannn.

if other carbohydrates, such as grape sugar. or gum arabic besubstituted for the starch in the above example: or it other aromaticchemicals, such as sultanilic acid,

,be substituted for the meta-phenylcne-diamin in thc-abore example.analogous products \i'ill be obtained.

I claim.

l. i h e.process otmali'ing-a sulfur dyestufi" consisting in heating amixture of copper sulfate. sulfur, sodium sulfid. a carbohydrate. and anaromatic chemical. Slllb stantially as described.

2, The processot making a sulfur dyestuii consisting in heating; amixture of copstarch described.

The process of making a sulfur dyestuii consisting in heating a mixtureof cop per sulfate, sult'ur. s \iium sulfid. a carbohydrate andmeta-phcnylene--diamiusub stantially as de cribed.

l. The process of making a sulfur dye .stuti consisting inhcatiug amixture oi copper sulfateu :-;ult'ur. sodium and meta-phenylene-d1anunsubstantially as suliid. starch 'les 1-ribed.

As a new article o'i".manufacturc'1he 'u'ti' produced by heating amixture o'l' uicta-phenylenc;iliainin, copper sulfate. sulfur andsodiumsullid. substantially in the manner specified. which is readily solublein cold water. cold causticalkaline or caustic carbonate solutions to abright reddi hlwomi solution. and dyes unmovdauted cotton in an alkalinesalt bath rcddish cutch brown shades.

' :ln testimonywhereof l have signed lliis specification in the presenceof two subscrib iu i; Witnesses.

EDMARD SAAHIEL CHAPIN.

liliit-nessesz FRITZ v. BRIESEN, i JOHN A. KEHLENnEoK.

